i think those suggestions is gonna be ''achievements" ?
or i miss understand it ?

Something like that. In TF2 the Strange weapons have the ability to record how many enemies have you killed with it, and there is also some items that can add more, different counters to that weapon. This would be the same thing.

Phantom Lancer: Total number of phantoms produced
Phantom Lancer: Number of single target spells used by enemies on your phantoms (The number of times you fooled them that that was you)
Phantom Lancer: Number of kills gained by phantoms' damage

Generally we've tried to make strange stats that everyone on your team is happy about. "Failboats" might not be good because it could encourage people to failboat intentionally. On the other hand, a stat that tracks how many people you've boated would encourage getting really good boats that hit the entire enemy team.

Beastmaster (Clearing) - Number of trees destroyed by axes
Dark Seer (No air, no life) - Number of trees destroyed by vacuum

Lich (Chain reaction) - Average number of heroes affected by ultimate

Queen of Pain (Argh, that feels good) - Total amount of damage taken as QoP

Veno (Little helpers) - Number of wards placed
Veno (Tower attacker) - Number of towers killed by wards
Veno (Slowly but steady) - Poison damage dealt to enemy heroes
Veno (A venomous one) - Number of times all five enemy heroes have been hit by ultimate